I have a table in a dataadapter
. I want to get the count and sum of a specific column of it. How is that possible?
This is the code for reach to the column, what after that?
DataColumn buy_count = myDataSet.Tables["all_saled"].Columns["how_much_buy"]
I know that we have sum, count,... in SQL, but how can I do it in C#?
You can use LINQ to DataSets
var sales = myDataSet.Tables["all_saled"].AsEnumerable();
var buy_total = sales.Sum(datarow => datarow.Field<int>("how_much_buy"));
Check the LINQ to DataSets 101 Samples
PS might need the System.Data.DataSetExtensions assembly referenced.
使用DataTable.Compute
方法:
int total = (int)myDataSet.Tables["all_saled"].Compute("SUM(how_much_buy)", null);
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